Title (fr)

Publication

Application

Priority

GB 0130418 A 20011220

Abstract (en)

The invention relates to a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith in the same dispersion a de-aggregating compound of formula (I) and at least one heterocyclic dye-forming coupler of formula (II), wherein the de-aggregating compound has the formula (I) <CHEM> wherein A is a hydrogen-bond-accepting hetero -atom or -group; Y is a hydrogen-bond-donating hetero -atom or -group; L is a linking group that is partially or wholly conjugated with A and linked to A by a carbon atom; n is 1, 2 or 3 hydrogen-bond-containing moieties; and (B) comprises the remaining atoms for completion of an unsubstituted or substituted heterocyclic ring or ring system containing the hydrogen bond-accepting hetero -atom or -group, which may contain one or more other heteroatoms selected from nitrogen, oxygen and sulfur; and wherein the heterocyclic dye-forming coupler has the formula (II):- <CHEM> wherein R<1> is hydrogen or a substituent; R<c> is a substituent; and q is 0 to 4; Z<a> represents the atoms necessary to complete an unsubstituted or substituted 5- to 10-membered heterocyclic ring system which may contain one or more other heteroatoms selected from nitrogen, oxygen and sulfur; providing that each R<c> is attached to a carbon atom of the ring; and X is selected from hydrogen or halogen or a group which is separable by the reaction of coupler with an oxidized colour developing agent. <??>When a compound of formula (I) is combined in a dispersion with a cyan or magenta dye-forming coupler of formula (II), it unexpectedly de-aggregates the dyes formed, reducing the unwanted absorptions in the spectra of the azomethine dyes and improving colour reproduction.